BMW Base Support System required. Please note that clamping width at the ski holder is 3.0 inches. 89.8" x 32" x 12.2" ( L x W x H) This dual purpose transporter offers two Ski and Snowboard configurations and can accommodate either 2 pairs of skis, 2 pairs of sticks and 2 snowboards or 4 pairs of skis and 4 pairs of ski sticks.